What true conspiracies did you hear news wise that were retracted later on or are still searchable?

Anytime there's a conspiracy or truth it gets turned as being false by fact checkers not long after it was official breaking news then the patents, the news reports, search engines and more start censoring the data from people. Then people just accept the fact checking in entirely is truth before questioning the truth of what their being told. The best way to figure out something is not by others influence but your own understanding and research. The world has few whistleblowers and more people who comply with the brainwashing. Anyways has anyone noticed any things that used to be news reports that are no longer accessible or have been changed to fit business, government, or world wide narratives to keep people from discovering the knowledge of situations? Also not really caring to hear mysterious things that have never had documentation released or are speculator as of currently. (Alternatively you can list any with actually disturbing news reports that people won't accept as true but have sources back by data or scientifically also.)